The present invention discloses a broadcast reception device including a connection section for connecting to a smart antenna that switches directivity or a unidirectional antenna with fixed directivity connected; a first channel search section for executing channel search in the smart antenna; a second channel search section for executing channel search in the unidirectional antenna; a communication section for providing the connected smart antenna with power and a control signal; and a connection detection section for detecting a voltage of the communication section varied by voltage drop caused by the communication section connected to the smart antenna, and detect one of presence and absence of connection of the smart antenna based on a result of the detection, the first channel search section is selected to execute the channel search when the connection detection section detects the connection of the smart antenna, and the second channel search section is selected to execute the channel search when the connection detection section does not detect the connection of the smart antenna.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A broadcast reception device having, comprising: a smart antenna switching directivity based on a control signal and not returning a signal in compliance with the EIA/CEA-909 standard; a unidirectional antenna with fixed directivity; a set top box connected to the smart antenna or the unidirectional antenna and obtaining airwave received by the smart antenna or the unidirectional antenna via an RF cable; wherein the set top box comprising, a controller outputting the control signal, a power supply circuit generating a power supply voltage, a connection interface connected to the smart antenna with a first wiring and a second wiring, supplying the smart antenna with the power supply voltage via the first wiring and supplying the smart antenna with the control signal via the second wiring, a connection detection section detecting a voltage of the first wiring by using a resistance connected in parallel with the first wiring, wherein the controller selects whether a channel search is executed in the smart antenna or in the uni-directional antenna based on the value of the detected voltage of the first wiring, the controller judges that the smart antenna is connected if the detected voltage of the first wiring is lower than a predetermined threshold value and that the smart antenna is not connected if the detected voltage of the first wiring is higher than the predetermined threshold value, the controller executes channel search in the smart antenna when it is judged that the smart antenna is connected, and executes channel search in the uni-directional antenna when it is judged that the smart antenna is not connected.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
September 20, 2008
April 9, 2013
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